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LPN-RK Low-Peak™ 250V Class RK1 Dual Element Time-Delay Fuses

LPN-RK Low-Peak™ 250V Class RK1 Dual Element Time-Delay Fuses

Description:
Ultimate protection Class RK1 dual element, current-limiting, time-delay fuses available with optional open fuse indication.

Time-delay:
10 seconds (minimum) at 500% of rated current for 35-60A.
8 seconds for 0-30A sizes.
 
Catalog Symbol:
LPN-RK(amp)SP (non-indicating)
LPN-RK(amp)SPI (indicating)

Ratings:
Volts: 250Vac, 125Vdc(0-60A); 250Vac, 250Vdc(70-600A)
Amps: 1⁄10-600A
IR: 300kA Vac RMS Sym. 100kA Vdc
 
Agency Information:
CE,
UL Listed, Guide JDDZ, File E4273
CSA Certified, Class 1422-02, File 53787,Class RK1 per CSA C22.2, No. 248.12

Catalog Numbers (amps) Non-indicating Fuses

LPN-RK-1/10SP LPN-RK-2-1/4SP LPN-RK-12SP LPN-RK-110SP
LPN-RK-15/100SP LPN-RK-2-1/2SP LPN-RK-15SP LPN-RK-125SP
LPN-RK-2/10SP LPN-RK-2-8/10SP LPN-RK-17-1/2SP LPN-RK-150SP
LPN-RK-3/10SP LPN-RK-3SP LPN-RK-20SP LPN-RK-175SP
LPN-RK-4/10SP LPN-RK-3-2/10SP LPN-RK-25SP LPN-RK-200SP
LPN-RK-1/2SP LPN-RK-3-1/2SP LPN-RK-30SP LPN-RK-225SP
LPN-RK-6/10SP LPN-RK-4SP LPN-RK-35SP LPN-RK-250SP
LPN-RK-8/10SP LPN-RK-4-1/2SP LPN-RK-40SP LPN-RK-300SP
LPN-RK-1SP LPN-RK-5SP LPN-RK-45SP LPN-RK-350SP
LPN-RK-1-1/8SP LPN-RK-5-6/10SP LPN-RK-50SP LPN-RK-400SP
LPN-RK-1-1/4SP LPN-RK-6SP LPN-RK-60SP LPN-RK-450SP
LPN-RK-1-4/10SP LPN-RK-6-1/4SP LPN-RK-70SP LPN-RK-500SP
LPN-RK-1-6/10SP LPN-RK-8SP LPN-RK-80SP LPN-RK-600SP
LPN-RK-1-8/10SP LPN-RK-9SP LPN-RK-90SP  
LPN-RK-2SP LPN-RK-10SP LPN-RK-100SP  

Catalog Numbers (amps) with indicating Fuses

Requires 75Vac minimum voltage.

LPN-RK-35SPI LPN-RK-100SPI LPN-RK-300SPI
LPN-RK-40SPI LPN-RK-110SPI LPN-RK-350SPI
LPN-RK-45SPI LPN-RK-125SPI LPN-RK-400SPI
LPN-RK-50SPI LPN-RK-150SPI LPN-RK-450SPI
LPN-RK-60SPI LPN-RK-175SPI LPN-RK-500SPI
LPN-RK-70SPI LPN-RK-200SPI LPN-RK-600SPI
LPN-RK-80SPI LPN-RK-225SPI  
LPN-RK-90SPI LPN-RK-250SPI  

Carton Quantity and Weight

Amp Rating Carton Qty.
0-30 10
35-60 10
70–100 5
110–200 1
225–400 1
450–600 1

Dimensions – in

 Features (0-60A)
• Industry’s only UL Listed and CSA Certified fuse with a 300kA Vac interrupting rating that exceeds requirements for virtually all applications
• Current-limitation for maximum short-circuit protection
• Easy selective coordination with all Low-Peak fuses using simple 2:1 ampacity ratio
• “No damage” Type “2” protection for IEC and NEMA starters when properly sized
• High inrush current motor protection
• Time-delay permits 130% FLA sizing for back-up motor protection
• Protection against single-phase motor damage
• Low watt loss power consumption
• Electrically isolated end caps for added safety
 
Features (70-600A)
• Industry’s only UL Listed and CSA Certified fuse with a 300kA Vac interrupting rating that exceeds requirements for virtually all applications
• Fast short-circuit protection provides optimal arc flash protection to reduce hazard to personnel
• Easy selective coordination with all Low-Peak fuses using simple 2:1 ampacity ratio
• Current-limiting for maximum short-circuit protection
• “No damage” Type “2” protection for IEC and NEMA motor starters when properly sized
• High in-rush current motor protection
• Time-delay that permits 130% FLA sizing for back-up motor protection
• Provides protection against single-phase motor damage
• Low watt loss power consumption
• Electrically isolated end caps for added safety

Applications (70-600A)
• Feeder and Branch Circuits
• Transformers
• Motors
• Solenoids
• General Purpose Circuits

Recommended Fuse Blocks

Fuse amps 1-pole 2-pole 3-pole
0-30 H25030-1 H25030-2 H25030-3
R25030-1 R25030-2 R25030-3
35-60 H25060-1 H25060-2 H25060-3
R25060-1 R25060-2 R25060-3
70-100 RM25100-1CR RM25100-2CR RM25100-3CR
110-200 RM25200-1CR RM25200-2CR RM25200-3CR
225-400 RM25400-1CR RM25400-2CR RM25400-3CR
450-600 RM25600-1CR RM25600-2CR

RM25600-3CR

Fuse Reducers For Class R Fuses

Equipment
Fuse Clips
Desired Fuse
(Case) Size
Catalog Numbers
(Pairs) 250V
60A 30A NO.263-R
100A 30A NO.213-R
60A NO.216-R
200A 60A NO.226-R
100A N0.2621-R
400A 100A NO.2641-R
200A NO.642-R
600A 100A NO.2661-R
200A NO.2662-R
400A NO.2664-R†

† Single reducer only (pair not required).

Time-Current Curves - Average Melt

Current-Limitation Curves

Current-Limiting Effects

Prosp.
S.C.C.             
Let-Through Current
(Apparent RMS Symmetrical  Vs. Fuse Rating)
30A 60A 100A 200A 400A 600A
1000 1000 1000 1000 1000 1000 1000
2000 1000 1000 2000 2000 2000 2000
3000 1000 1000 2000 3000 3000 3000
5000 1000 2000 2000 3000 5000 5000
10,000 1000 2000 3000 4000 7000 9000
15,000 1000 2000 3000 5000 8000 11,000
20,000 1000 3000 3000 5000 8000 11,000
25,000 1000 3000 3000 5000 9000 12,000
30,000 2000 3000 4000 6000 9000 12,000
35,000 2000 3000 4000 6000 10,000 13,000
40,000 2000 3000 4000 6000 10,000 13,000
50,000 2000 3000 4000 7000 11,000 14,000
60,000 2000 3000 4000 7000 11,000 16,000
70,000 2000 3000 4000 7000 12,000 16,000
80,000 2000 4000 5000 8000 12,000 16,000
90,000 2000 4000 5000 7000 13,000 17,000
100,000 2000 4000 5000 8000 13,000 17,000
150,000 2000 4000 6000 9000 15,000 19,000
200,000 3000 5000 6000 11,000 16,000 20,000
250,000 3000 5000 7000 11,000 17,000 21,000
300,000 3000 6000 7000 12,000 18,000 22,000